diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/ieee80211.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index c271184a3968..fba4c44da832 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -4636,6 +4636,41 @@ static inline u8 ieee80211_mle_common_size(const u8 *data) } /** + * ieee80211_mle_get_eml_cap - returns the EML capability + * @data: pointer to the multi link EHT IE + * + * The element is assumed to be big enough. This must be checked by + * ieee80211_mle_size_ok(). + * If the EML capability can't be found (the type is not basic, or + * the EML capability presence bit is clear), 0 will be returned. + */ +static inline u16 ieee80211_mle_get_eml_cap(const u8 *data) +{ + const struct ieee80211_multi_link_elem *mle = (const void *)data; + u16 control = le16_to_cpu(mle->control); + const u8 *common = mle->variable; + + if (u16_get_bits(control, IEEE80211_ML_CONTROL_TYPE) != + IEEE80211_ML_CONTROL_TYPE_BASIC) + return 0; + + /* common points now at the beginning of ieee80211_mle_basic_common_info */ + common += sizeof(struct ieee80211_mle_basic_common_info); + + if (!(control & IEEE80211_MLC_BASIC_PRES_EML_CAPA)) + return 0; + + if (control & IEEE80211_MLC_BASIC_PRES_LINK_ID) + common += 1; + if (control & IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT) + common += 1; + if (control & IEEE80211_MLC_BASIC_PRES_MED_SYNC_DELAY) + common += 2; + + return get_unaligned_le16(common); +} + +/** * ieee80211_mle_size_ok - validate multi-link element size * @data: pointer to the element data * @len: length of the containing element |